#cesium-image-layer-split:hover {
    cursor: ew-resize;
}
/* 卷帘对比的分界线 */
#cesium-image-layer-split{
    position: absolute;
    left: 50%;
    top: 0;
    background-color: #d3d3d3;
    width: 5px;
    height: 100%;
}